export default function(timestamp, showTime = false) {
  const date = new Date(+timestamp)
  const month = (date.getMonth() + 1).toString().padStart(2, "0")
  const day = date.getDate().toString().padStart(2, "0")
  const hour = date.getHours().toString().padStart(2, "0")
  const minute = date.getMinutes().toString().padStart(2, "0")
  let str = `${date.getFullYear()}-${month}-${day} ${hour}:${minute}`
  if (showTime) {
    const second = date.getSeconds().toString().padStart(2, "0")
    str += `:${second}`
  }
  return str
}